Answer:
Hi
Step-by-step explanation:
You have to subtract it because you add a negative and positive fraction together you can add a positive with a positive or vice versa but you can add n and p together so you have to subtract.
Hope it helps
If an number is an absolute value, it means that the number will be positive. You would plug and check the same way you would for any other equation and it a solution is considered extraneous if the equation is not equal
Move your finger up the timeline or down depending on if it’s adding or subtracting
Answer:
The correct answer is that a rose bush costs $10 and a shrub costs $4
Step-by-step explanation:
To solve this, start by writing equations for what each spent. Use x for the cost of a rose bush and y for the cost of a shrub. Below would be the equations for each.
Rob: 8x + 5y = 100
Amy: 8x + 8y = 112
Now to find the cost, we multiply Rob's equation by -1 and add them together. This will get x to cancel and allow us to solve for y.
-8x - 5y = -100
8x + 8y = 112
------------------
3y = 12
y = 4
So we know the cost of a shrub is $4. Now we can plug that in to either of the original equations and solve for the rose bush cost.
8x + 5y = 100
8x + 5(4) = 100
8x + 20 = 100
8x = 80
x = 10
Which means that a rose bush costs $10.
What I like to do with negative numbers is count back from the positive to the negative here I can make a number line! :) think of it this way 0 is the middle of your positive and negative numbers it’s where they are coming together!
-5 -4 -3 -2 -1 0 1 2 3 4 5
————————————
Here #5 (on your paper)
8-11 so count back from 8 eleven times
8-11= -3
If u need anymore help I’m here :)
Ik negative & positive numbers are pretty tricky lol
Best of luck :))
